Drying apparatus.



0. S. SLEEPER. DRYING APPRATUS.

APPLICATION FILED AUG. 19, 1909.

@93,89% Patented May 30, 1911. a SHEETS-SHEET 1f o. s. SLBEPBR.

v vDRYING APPARATUS.

APPLIOATIQN FILED AUG, 19, 1902. @Qp Patented May 30,1911.v

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0. S. SLEEPER.

DRYING APPARATUS.

APPLICATION'HLBD AUG. 19, 1909.

Patented VMay 30, 1911 3 SHEETS-SHEET 3,

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1rUl\\lTTElD STATES PATENT OLVER S. SLEEPER, OF BUFFALO,

NEW YORK, ASSICMATHR, TO BUFFALO FOUNDRY AND MACHINE COMPANY, OF BUFFALO, NEW YORK, A CORPORATION 0F NEW YORK.

DRYING APPARATUS.

Application led August 19, 1939.

to that class of driers in which the material under treatment is dried under vacuo although thesame is also applicable to other forms of driers.`

One form of machine for this purpose as heretofore constructed comprises an inte'r-v nally heated drying drum which rotates vertically in a drying chamber, a'pan which supports the material to be dried in position' to be picked up by the underside of the periphery of the drum, a supply pipe which supplies the liquid or material to be dried into the pan at the front side thereof, a receiving lchamber for; .the dried material arranged on the front side of the drum, and a scraper whereby the dried material is .re-

moved from the periphery of the drum on the front side thereof and directed into the receiving chamber.

This construction is objectionable inasmuchI as the supply pipe' and scraper are so close together that the space between the same i s` liable to become clogged with dried material and is difficult to clean.

` One of the objects of this invention is to so construct and arrange the supply pan and the supply pipe that the above mentioned clogging is avoided and cleaning ofthe machiney is facilitated and at the same time the liquid is maintained at a lower temperature and prevented from frothing or foaming while being deposited 'on the drying drum.

Another object of my invention is to prevent the dried material from accumulating on the scraper adjusting devices and clogging the machine. In the accompanying drawings consisting of 3 sheets: Figure l is a vertical cross section of my improved drying apparatus.` Fig. 2 is a fragmentary horizontal section in line 2-2, Fig. 1.y Fig. 3 is a horizontal longi-l tudinal section in line 3-3, Fig. l. Fig. t is a detached side elevation of one of the levers or handles for shifting a liquid supplying pan within the drying chamber. Fig. 5 is a vertical longitudinal section inline 55,

specification of Letters Patent.

front 4part z' g. 1. Similar letters of reference indicate cor- Patented May 30, 19M..

Serial No. 513,810.

responding parts throughout4 the several views. I

A represents a vacuum or drying chamber having a semi-cylindrical top a and provided in its lower rear part with a liquid4 basin or reservoir B, and in its lower front part with a delivery spout, D which is separated from thebasin or reservoir by an upright partition d. The vapors are drawn through an outlet al in the top of the drying chamber by means of a vacuum pump or other suitable exhausting device to produce a vacuum in the drying chamber and facili*n tate the drying of the liquid stock.

Horizontally and lengthwise within the drying chamber isa single vertically rotatable cylindrical heating or drying drum E which is provided with hollow trunnions e, 61 at its opposite ends turning in bearings e2 on the end walls of the drying chamber, thereby pivotally supporting the drum in Ythe drying chamber.

The drying drum is turned, so that its underside moves from the front to the rear part of the drying chamber, as indicated by the arrow in Fig. l.v A gear wheel f secured to the trunnion e1 serves as part of the means kfor driving the heating drum although any suitable means may be employed for this purpose.

The heating of the drying drum is preferably eifected by conducting steam by means of a supply pipaG into the hollow trunnion c and the water of condensation is removed fromy the drum by a scoop 7L arranged adjacent to the bottom bore of the heating drum and connected by a pipe H with the other trunnion el which latter joins a stationary outlet pipe 71,1 for the water of condensation.

,lnderneath the periphery of the drum and above the liquid basin are arranged the means whereby the liquid'to be dried is supplied to theperiphery of the drum. The means for this purpose shown in the drawings comprise twopans or pan sections I, I which are arranged end to end lengthwise of the drying chamber and drum and each of which is provided with a bottom having a which is arranged below the front part -of the drum and curved concentrically therewith and a'rear part l which is arranged tangentially below the rear part- 'of the drum, a front longitudinal flange 2 rising from the front edge of the bottom into engagement with the periphery of the dry- .15" to'thepans comprises two horizontal deliving drum, a rear longitudinal flange 21,3: rising from the rearvedge of the bottom; ata`disj tance from the peripheryjof the. drying drum, and: two' curved end flanges 'it' are* ranged at oppositeftransverse edges ofthe b ottomand engaging with their vfront parts against thel periphery. of the drying 1 drum. Each of these pans is adapted to contain a Abath of theliquidwhich is'tx to be dried vand into which the lower part of the periphery ery pipes -or `pipe sections K, K which are arranged axially in line'vlengthwise of 'the drying chamber and each of which extends lengthwise through thehspace within one o f 'the pans adjacent. to the rear edge thereof and projects'with its inner and outer ends Y through the adjacent parts ofthe end flanges 'of the respective pan. At suitable distances apartthe panis 'preferably connected with the supply pipe by 'brackets Z. At its inner end each supply pipe'is journaled in a bear- -ingfZ1 formed lon a bracket L projecting forwardly from' the rear wall of the drying chamber lwhile the outer end thereof is journaled in a stuflingfbox M on the' adjacent end wall ofthe' drying' chamber.

The'liquid to be dried is supplied to each delivery pipeby means of a supply pipe N having a valv'efaand connected by a rotata- Y Y construction.

. preferably jarra ble coupling or joint al with the outer end of the respective delivery pipe. On its front side eachdelivery pipe, is provided with a plurality ef delivery openings m which are The liquid escapes-)through the openings in the pipes Klafilid llsfthjpans forming a bath in the latterthlrcugh which the periphery of the drum sweep'siiontinuously. The amount c olfliquid thus gdelivered into. the pans is greater than' the amount which ladheres to theV drum, so that the pans always remain 'the basin of the drying chamber below the rear..J art of the drum. From this basin the liquidj is again withdrawn through a return pipe o connected with .the bottom of the bag liquid isagainreturned into the'pans, thereby constantly circulating the undried liquid. The liquid may be thus transferred from the basin tothe pans by a pump of vany suitable [As'the liquid or wet material tobe dried is carried upwardly on the rear side and downwardly on the front side of the drum the heat within the latter causes this material to dry on the periphery of the drum.

lJust before the rearwardly moving under;

ed in 'a longitudinal row.

.side of the druin'reaclies the liquid supply devicesthe kdried material is removed from the periphery of the, drum and discharged into the spout', chute'or conduit D by means of a scraper S which is pivoted on the upper -end ofthe partition clin'front oftheliquid supplying devices and yieldingly held with its upper free' edge in engagement with the I periphery of the drum by a'plurality of adjusting-'devices leach lof -which comprises a shifting rod s extending transversely .across the spout D and through the front. wallof the drying chamber and pivotallyconnected at its rear end withthe'v scraper, an adjusting yoke T having a screw connection with a bracket t on the outer side of the drying chamber, and a spring tl interposed between said yoke and -a shoulder on the shifting rod.

As the streams of vliquid issue fromatheA delivery openings inthe pipes K the same lare directed forwardly'into the space between the pansand the underside of the drum and opposite tothe direction, ofk rotation of the lower' part 'f the drum which is receiving a new film of the'liquid to be dried. The liqiiidstreams in their forward. movement strike the front flanges of the pans which latter again deflect the streams toward the rear flanges thereof. By this means the liquid is retained in the pans 'forl a longer period than would otherwisebe the' case, thereby avoiding frothing or foaming of the liquidin the pans and causing the same to be presented in the form ofa dense bath to the drum Wherebyit4 is possible for a thicker `film of liquid to adhere to the drum and thus increase the capacity of the machine accordingly.A 'Furthermore, by delivering the liquid into the pans 'opposite to the direction of movement of the adjacent part of the drinn, the liquid may be kept colder and thus facilitate its adhesion to the .drum, this being particularly desirable for .recovered by this machine. fulland presental bath of uniform depth to `the Adrum while the surplus escapes 'from the -pans at the rear endsthereof yand drops into When it is desired to clean the pans the front endsthereof are swung downwardly, l and rearwardly away from the underside of the drum by turning the supply pipes K in ythe' proper direction, these pipes at this time operating as shaftsfor this purpose, thereby rendering all parts of the pans accessible to the operator for thoroughly cleaning the same. Entrance into the drying chamber I are supported on benches or racks r, as

.position by chamber which openings are normally closed by Vdoors W.

The space between the front ofthe drum and the drying'chamber above the scraper anrl disintegrator is preferably partly obstructed by an inclined dust guard w which is mounted on the drying chamber-and thus prevents any of the dried material inthe form 0tpowder or dust out of the receiving chamber to the vapor outlet and,lost.

Owing to the accessibility of all parts of this dryingappara'tus the same ycan be thoris held against movement together with the respective pan when in its operative means of a clamping. bolt p1 arranged on the exterior of the drying chamber and receiving a slot p2 in said lever, as` shown in Figs. 8 and 4. By thus pivoting the pans andalso delivering the Iliquid into the same at their rear ends the liability of clogging the space between liquid supplying devices and scraper is avoided, thereby permitting the machine to run without interruption from,this cause.

Then it is desired to use only part ofthe drier, as is the case when drying a small oughly cleaned, so'that it is absolutely sanibatcli of material, only one of the supply tary, thereby rendering the same especiallyv pans need be employed during which time adapted for drying food products although it is equally well adapted for dryingv other materials in the Jform of liquids, solutions or e1nulsionsor materials in suspension such as lead, dyes, colors and paints, 81e.

l claim as my`invention:V l. A drying apparatiiscomprising a drying chamber, a vertically rotating drum arranged in said chamber, a scraper engaging with the drinn, and a liquid supply pan independent ot' said chamber arranged below the drum and having a bottom, a vfront iiange, a rear iiange, and two end anges, said front and end fianges engaging the periphery of said drum while said rear iiange is out of engagement therefrom.

A drying apparatus comprising adry ing chamber, a vertically rotating drum arranged in said chamber, a scraper engaging with thc driun, a liquid supply pan independent ot said chamber arranged below the drum and having a iiange at one longitudinal edge which engages the periphery of thc drum. and a supply pipe arranged adjacent tothe opposite longitudinal edge of the pan and having outlet openings on the side facing said iiange.

3. A drying apparatus comprising a drying chamber, a drum arranged within the chamber and rotating, so that its underside moves from the front to the rear side of said chamberr` a scraper engaging with the periphery ot the drum on the lower trout side taereo't, a liquid supply pan arranged below the lower rear part ot said drinn and inge at iront edge the other pan may be turned downwardly iiito an inoperative position.

ln order to keep the liquid in thebasin cool. a retrigerating medium such as water is conducted through a coil of pipes R which are arranged in the basin and which shown in Figs. l and 6. y

The dried material which is removed Jfrom the periphery of the drum is conducted by the spout into a receiving chamber U the upper end of which communicates with the lower end of said spout. A

In the absence ot any provision to prevent it the dried material which is removed from the drum in the form of large pieces or sheets is liable to lodge on the shifting rods s of the scraper adjusting devices and sometiinesclog the delivery spout. To prevent this` means are provided whereby the material tending to lodge on the scraper shiiting rod is disintegrated and caused to drop through the spout into the receiving cham ber.v The preferred means for this purpose which are shown inthe drawings comprise a horizontal. beater sha-ft V which is 'arranged lengthwise above the spout and the scraper shifting rods adjacent to the scraper and drinn and journaled at its opposite ends in bearings or stuii'ingboxes in the end walls ot the drying chamber and plurality..v ot beaters. ting/ers or pins/1i projecting laterally from the beater s VQt into the spaces between the scraper shitting rods. pon turninn` the beater shaft by means et a driving beu' Y around piiliey 'al means, the

'from t' uppljf pipe arront siee which toward sfd apparatiri .a omprisins a dryy A. drum a within the ating so e its underside 'ront 'to 'the rear de of i v i pan arranger et' said drinn and from being carried eriphelv of the which engages with the periphery of the drum, and a longitudinal supply pipe arranged at the rear edge of the pan and having outlet openings on its front side which direct the streams of liquid toward said front flange,` said pan being pivoted to swing about the axis of said pipe.

5. A drying apparatus comprising a drying chamber,'a drum arranged' within the chamber and rotating so that its underside moves from the front to the rear side of said chamber, a scraper engaging with the periphery of the drum on the lower front side thereof, a liquid supply pan arranged below the lower rear part of said drum and having an upright flange at its front edge -which engages with the periphery of the drum, a longitudinal supply pipe connected with the rear part of said pan and provided with openings on its front side through which the liquid to be dried is directed toward said front flange, and bearings in which said pipe is journaled.

6. A drying apparatus comprising a drying chamber, a drum arranged within the chamber and rotating so that its underside moves from, the front to the rear side of said chamber, a scraper engaging with the periphery of the drum on the lower front side thereof, a liquid supply pan arranged belowl the lower rear part of said drum and having an upright flange at its front edge which engages with the periphery of the drum, a longitudinal supply pipe connected l with'the rear part of said pan and provided withy openings on its front side through which the liquid to be dried is directed toward said front flange, bearings in which said pipe is journaled, a shifting lever connected with saidv pipe externally of the drying ch'amber, and a fastening device for holding 'said lever in its normal position.

7. A drying apparatus comprisinga 'drying chamber, a drum rotating vertically in said chamber, 'a'scraper engaging with said drum, two liquid supply pans arranged end to end below the drum and adapted to support the liquid to be dried in position tol be engaged by the periphery of the drum, and means for moving said pans independently toward and from the drum.

8. A drying apparatus comprising a drying chamber having a delivery spout', a

drum rotating vertically in said chamber, a scraper adapted to remove the dried material from said drum and direct the same into the spout, and means for disin'tegrating the material removed 'from the drum arranged adjacent to the latter.

9. A drying apparatus comprising a drying chamber having a delivery spout, a y

drumA rotating vertically in said chamber, a scraper adapted to remove the dried material from'said drum and direct the same into the spout, and means for disintegrating the material removed from the drum com- Aa horizontal .shaft arranged lengthwise above said spout and adjusting rods and adjacent to said scraper and drum, and a plurality of beaters projecting laterally' from said shaft into the spaces between said shifting rods. 1 y

Witnessmy hand this 18th day of August, 1 909.

OLIVER S.-SLEEPER. l/Vitnesses;

THEO. L( PoPP, E. M. GRAHAM. 

